[linux.git] / drivers / ptp / ptp_chardev.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * PTP 1588 clock support - character device implementation.
 *
 * Copyright (C) 2010 OMICRON electronics GmbH
 */
#include <linux/module.h>
#include <linux/posix-clock.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/timekeeping.h>

#include <linux/nospec.h>

#include "ptp_private.h"

static int ptp_disable_pinfunc(struct ptp_clock_info *ops,
			       enum ptp_pin_function func, unsigned int chan)
{
	struct ptp_clock_request rq;
	int err = 0;

	memset(&rq, 0, sizeof(rq));

	switch (func) {
	case PTP_PF_NONE:
		break;
	case PTP_PF_EXTTS:
		rq.type = PTP_CLK_REQ_EXTTS;
		rq.extts.index = chan;
		err = ops->enable(ops, &rq, 0);
		break;
	case PTP_PF_PEROUT:
		rq.type = PTP_CLK_REQ_PEROUT;
		rq.perout.index = chan;
		err = ops->enable(ops, &rq, 0);
		break;
	case PTP_PF_PHYSYNC:
		break;
	default:
		return -EINVAL;
	}

	return err;
}

int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
		    enum ptp_pin_function func, unsigned int chan)
{
	struct ptp_clock_info *info = ptp->info;
	struct ptp_pin_desc *pin1 = NULL, *pin2 = &info->pin_config[pin];
	unsigned int i;

	/* Check to see if any other pin previously had this function. */
	for (i = 0; i < info->n_pins; i++) {
		if (info->pin_config[i].func == func &&
		    info->pin_config[i].chan == chan) {
			pin1 = &info->pin_config[i];
			break;
		}
	}
	if (pin1 && i == pin)
		return 0;

	/* Check the desired function and channel. */
	switch (func) {
	case PTP_PF_NONE:
		break;
	case PTP_PF_EXTTS:
		if (chan >= info->n_ext_ts)
			return -EINVAL;
		break;
	case PTP_PF_PEROUT:
		if (chan >= info->n_per_out)
			return -EINVAL;
		break;
	case PTP_PF_PHYSYNC:
		if (chan != 0)
			return -EINVAL;
		break;
	default:
		return -EINVAL;
	}

	if (info->verify(info, pin, func, chan)) {
		pr_err("driver cannot use function %u on pin %u\n", func, chan);
		return -EOPNOTSUPP;
	}

	/* Disable whatever function was previously assigned. */
	if (pin1) {
		ptp_disable_pinfunc(info, func, chan);
		pin1->func = PTP_PF_NONE;
		pin1->chan = 0;
	}
	ptp_disable_pinfunc(info, pin2->func, pin2->chan);
	pin2->func = func;
	pin2->chan = chan;

	return 0;
}

int ptp_open(struct posix_clock *pc, fmode_t fmode)
{
	return 0;
}

long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
{
	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
	struct ptp_sys_offset_extended *extoff = NULL;
	struct ptp_sys_offset_precise precise_offset;
	struct system_device_crosststamp xtstamp;
	struct ptp_clock_info *ops = ptp->info;
	struct ptp_sys_offset *sysoff = NULL;
	struct ptp_system_timestamp sts;
	struct ptp_clock_request req;
	struct ptp_clock_caps caps;
	struct ptp_clock_time *pct;
	unsigned int i, pin_index;
	struct ptp_pin_desc pd;
	struct timespec64 ts;
	int enable, err = 0;

	switch (cmd) {

	case PTP_CLOCK_GETCAPS:
	case PTP_CLOCK_GETCAPS2:
		memset(&caps, 0, sizeof(caps));

		caps.max_adj = ptp->info->max_adj;
		caps.n_alarm = ptp->info->n_alarm;
		caps.n_ext_ts = ptp->info->n_ext_ts;
		caps.n_per_out = ptp->info->n_per_out;
		caps.pps = ptp->info->pps;
		caps.n_pins = ptp->info->n_pins;
		caps.cross_timestamping = ptp->info->getcrosststamp != NULL;
		caps.adjust_phase = ptp->info->adjphase != NULL &&
				    ptp->info->getmaxphase != NULL;
		if (caps.adjust_phase)
			caps.max_phase_adj = ptp->info->getmaxphase(ptp->info);
		if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
			err = -EFAULT;
		break;

	case PTP_EXTTS_REQUEST:
	case PTP_EXTTS_REQUEST2:
		memset(&req, 0, sizeof(req));

		if (copy_from_user(&req.extts, (void __user *)arg,
				   sizeof(req.extts))) {
			err = -EFAULT;
			break;
		}
		if (cmd == PTP_EXTTS_REQUEST2) {
			/* Tell the drivers to check the flags carefully. */
			req.extts.flags |= PTP_STRICT_FLAGS;
			/* Make sure no reserved bit is set. */
			if ((req.extts.flags & ~PTP_EXTTS_VALID_FLAGS) ||
			    req.extts.rsv[0] || req.extts.rsv[1]) {
				err = -EINVAL;
				break;
			}
			/* Ensure one of the rising/falling edge bits is set. */
			if ((req.extts.flags & PTP_ENABLE_FEATURE) &&
			    (req.extts.flags & PTP_EXTTS_EDGES) == 0) {
				err = -EINVAL;
				break;
			}
		} else if (cmd == PTP_EXTTS_REQUEST) {
			req.extts.flags &= PTP_EXTTS_V1_VALID_FLAGS;
			req.extts.rsv[0] = 0;
			req.extts.rsv[1] = 0;
		}
		if (req.extts.index >= ops->n_ext_ts) {
			err = -EINVAL;
			break;
		}
		req.type = PTP_CLK_REQ_EXTTS;
		enable = req.extts.flags & PTP_ENABLE_FEATURE ? 1 : 0;
		if (mutex_lock_interruptible(&ptp->pincfg_mux))
			return -ERESTARTSYS;
		err = ops->enable(ops, &req, enable);
		mutex_unlock(&ptp->pincfg_mux);
		break;

	case PTP_PEROUT_REQUEST:
	case PTP_PEROUT_REQUEST2:
		memset(&req, 0, sizeof(req));

		if (copy_from_user(&req.perout, (void __user *)arg,
				   sizeof(req.perout))) {
			err = -EFAULT;
			break;
		}
		if (cmd == PTP_PEROUT_REQUEST2) {
			struct ptp_perout_request *perout = &req.perout;

			if (perout->flags & ~PTP_PEROUT_VALID_FLAGS) {
				err = -EINVAL;
				break;
			}
			/*
			 * The "on" field has undefined meaning if
			 * PTP_PEROUT_DUTY_CYCLE isn't set, we must still treat
			 * it as reserved, which must be set to zero.
			 */
			if (!(perout->flags & PTP_PEROUT_DUTY_CYCLE) &&
			    (perout->rsv[0] || perout->rsv[1] ||
			     perout->rsv[2] || perout->rsv[3])) {
				err = -EINVAL;
				break;
			}
			if (perout->flags & PTP_PEROUT_DUTY_CYCLE) {
				/* The duty cycle must be subunitary. */
				if (perout->on.sec > perout->period.sec ||
				    (perout->on.sec == perout->period.sec &&
				     perout->on.nsec > perout->period.nsec)) {
					err = -ERANGE;
					break;
				}
			}
			if (perout->flags & PTP_PEROUT_PHASE) {
				/*
				 * The phase should be specified modulo the
				 * period, therefore anything equal or larger
				 * than 1 period is invalid.
				 */
				if (perout->phase.sec > perout->period.sec ||
				    (perout->phase.sec == perout->period.sec &&
				     perout->phase.nsec >= perout->period.nsec)) {
					err = -ERANGE;
					break;
				}
			}
		} else if (cmd == PTP_PEROUT_REQUEST) {
			req.perout.flags &= PTP_PEROUT_V1_VALID_FLAGS;
			req.perout.rsv[0] = 0;
			req.perout.rsv[1] = 0;
			req.perout.rsv[2] = 0;
			req.perout.rsv[3] = 0;
		}
		if (req.perout.index >= ops->n_per_out) {
			err = -EINVAL;
			break;
		}
		req.type = PTP_CLK_REQ_PEROUT;
		enable = req.perout.period.sec || req.perout.period.nsec;
		if (mutex_lock_interruptible(&ptp->pincfg_mux))
			return -ERESTARTSYS;
		err = ops->enable(ops, &req, enable);
		mutex_unlock(&ptp->pincfg_mux);
		break;

	case PTP_ENABLE_PPS:
	case PTP_ENABLE_PPS2:
		memset(&req, 0, sizeof(req));

		if (!capable(CAP_SYS_TIME))
			return -EPERM;
		req.type = PTP_CLK_REQ_PPS;
		enable = arg ? 1 : 0;
		if (mutex_lock_interruptible(&ptp->pincfg_mux))
			return -ERESTARTSYS;
		err = ops->enable(ops, &req, enable);
		mutex_unlock(&ptp->pincfg_mux);
		break;

	case PTP_SYS_OFFSET_PRECISE:
	case PTP_SYS_OFFSET_PRECISE2:
		if (!ptp->info->getcrosststamp) {
			err = -EOPNOTSUPP;
			break;
		}
		err = ptp->info->getcrosststamp(ptp->info, &xtstamp);
		if (err)
			break;

		memset(&precise_offset, 0, sizeof(precise_offset));
		ts = ktime_to_timespec64(xtstamp.device);
		precise_offset.device.sec = ts.tv_sec;
		precise_offset.device.nsec = ts.tv_nsec;
		ts = ktime_to_timespec64(xtstamp.sys_realtime);
		precise_offset.sys_realtime.sec = ts.tv_sec;
		precise_offset.sys_realtime.nsec = ts.tv_nsec;
		ts = ktime_to_timespec64(xtstamp.sys_monoraw);
		precise_offset.sys_monoraw.sec = ts.tv_sec;
		precise_offset.sys_monoraw.nsec = ts.tv_nsec;
		if (copy_to_user((void __user *)arg, &precise_offset,
				 sizeof(precise_offset)))
			err = -EFAULT;
		break;

	case PTP_SYS_OFFSET_EXTENDED:
	case PTP_SYS_OFFSET_EXTENDED2:
		if (!ptp->info->gettimex64) {
			err = -EOPNOTSUPP;
			break;
		}
		extoff = memdup_user((void __user *)arg, sizeof(*extoff));
		if (IS_ERR(extoff)) {
			err = PTR_ERR(extoff);
			extoff = NULL;
			break;
		}
		if (extoff->n_samples > PTP_MAX_SAMPLES
		    || extoff->rsv[0] || extoff->rsv[1] || extoff->rsv[2]) {
			err = -EINVAL;
			break;
		}
		for (i = 0; i < extoff->n_samples; i++) {
			err = ptp->info->gettimex64(ptp->info, &ts, &sts);
			if (err)
				goto out;
			extoff->ts[i][0].sec = sts.pre_ts.tv_sec;
			extoff->ts[i][0].nsec = sts.pre_ts.tv_nsec;
			extoff->ts[i][1].sec = ts.tv_sec;
			extoff->ts[i][1].nsec = ts.tv_nsec;
			extoff->ts[i][2].sec = sts.post_ts.tv_sec;
			extoff->ts[i][2].nsec = sts.post_ts.tv_nsec;
		}
		if (copy_to_user((void __user *)arg, extoff, sizeof(*extoff)))
			err = -EFAULT;
		break;

	case PTP_SYS_OFFSET:
	case PTP_SYS_OFFSET2:
		sysoff = memdup_user((void __user *)arg, sizeof(*sysoff));
		if (IS_ERR(sysoff)) {
			err = PTR_ERR(sysoff);
			sysoff = NULL;
			break;
		}
		if (sysoff->n_samples > PTP_MAX_SAMPLES) {
			err = -EINVAL;
			break;
		}
		pct = &sysoff->ts[0];
		for (i = 0; i < sysoff->n_samples; i++) {
			ktime_get_real_ts64(&ts);
			pct->sec = ts.tv_sec;
			pct->nsec = ts.tv_nsec;
			pct++;
			if (ops->gettimex64)
				err = ops->gettimex64(ops, &ts, NULL);
			else
				err = ops->gettime64(ops, &ts);
			if (err)
				goto out;
			pct->sec = ts.tv_sec;
			pct->nsec = ts.tv_nsec;
			pct++;
		}
		ktime_get_real_ts64(&ts);
		pct->sec = ts.tv_sec;
		pct->nsec = ts.tv_nsec;
		if (copy_to_user((void __user *)arg, sysoff, sizeof(*sysoff)))
			err = -EFAULT;
		break;

	case PTP_PIN_GETFUNC:
	case PTP_PIN_GETFUNC2:
		if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
			err = -EFAULT;
			break;
		}
		if ((pd.rsv[0] || pd.rsv[1] || pd.rsv[2]
				|| pd.rsv[3] || pd.rsv[4])
			&& cmd == PTP_PIN_GETFUNC2) {
			err = -EINVAL;
			break;
		} else if (cmd == PTP_PIN_GETFUNC) {
			pd.rsv[0] = 0;
			pd.rsv[1] = 0;
			pd.rsv[2] = 0;
			pd.rsv[3] = 0;
			pd.rsv[4] = 0;
		}
		pin_index = pd.index;
		if (pin_index >= ops->n_pins) {
			err = -EINVAL;
			break;
		}
		pin_index = array_index_nospec(pin_index, ops->n_pins);
		if (mutex_lock_interruptible(&ptp->pincfg_mux))
			return -ERESTARTSYS;
		pd = ops->pin_config[pin_index];
		mutex_unlock(&ptp->pincfg_mux);
		if (!err && copy_to_user((void __user *)arg, &pd, sizeof(pd)))
			err = -EFAULT;
		break;

	case PTP_PIN_SETFUNC:
	case PTP_PIN_SETFUNC2:
		if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
			err = -EFAULT;
			break;
		}
		if ((pd.rsv[0] || pd.rsv[1] || pd.rsv[2]
				|| pd.rsv[3] || pd.rsv[4])
			&& cmd == PTP_PIN_SETFUNC2) {
			err = -EINVAL;
			break;
		} else if (cmd == PTP_PIN_SETFUNC) {
			pd.rsv[0] = 0;
			pd.rsv[1] = 0;
			pd.rsv[2] = 0;
			pd.rsv[3] = 0;
			pd.rsv[4] = 0;
		}
		pin_index = pd.index;
		if (pin_index >= ops->n_pins) {
			err = -EINVAL;
			break;
		}
		pin_index = array_index_nospec(pin_index, ops->n_pins);
		if (mutex_lock_interruptible(&ptp->pincfg_mux))
			return -ERESTARTSYS;
		err = ptp_set_pinfunc(ptp, pin_index, pd.func, pd.chan);
		mutex_unlock(&ptp->pincfg_mux);
		break;

	default:
		err = -ENOTTY;
		break;
	}

out:
	kfree(extoff);
	kfree(sysoff);
	return err;
}

__poll_t ptp_poll(struct posix_clock *pc, struct file *fp, poll_table *wait)
{
	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);

	poll_wait(fp, &ptp->tsev_wq, wait);

	return queue_cnt(&ptp->tsevq) ? EPOLLIN : 0;
}

#define EXTTS_BUFSIZE (PTP_BUF_TIMESTAMPS * sizeof(struct ptp_extts_event))

ssize_t ptp_read(struct posix_clock *pc,
		 uint rdflags, char __user *buf, size_t cnt)
{
	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
	struct timestamp_event_queue *queue = &ptp->tsevq;
	struct ptp_extts_event *event;
	unsigned long flags;
	size_t qcnt, i;
	int result;

	if (cnt % sizeof(struct ptp_extts_event) != 0)
		return -EINVAL;

	if (cnt > EXTTS_BUFSIZE)
		cnt = EXTTS_BUFSIZE;

	cnt = cnt / sizeof(struct ptp_extts_event);

	if (mutex_lock_interruptible(&ptp->tsevq_mux))
		return -ERESTARTSYS;

	if (wait_event_interruptible(ptp->tsev_wq,
				     ptp->defunct || queue_cnt(queue))) {
		mutex_unlock(&ptp->tsevq_mux);
		return -ERESTARTSYS;
	}

	if (ptp->defunct) {
		mutex_unlock(&ptp->tsevq_mux);
		return -ENODEV;
	}

	event = kmalloc(EXTTS_BUFSIZE, GFP_KERNEL);
	if (!event) {
		mutex_unlock(&ptp->tsevq_mux);
		return -ENOMEM;
	}

	spin_lock_irqsave(&queue->lock, flags);

	qcnt = queue_cnt(queue);

	if (cnt > qcnt)
		cnt = qcnt;

	for (i = 0; i < cnt; i++) {
		event[i] = queue->buf[queue->head];
		queue->head = (queue->head + 1) % PTP_MAX_TIMESTAMPS;
	}

	spin_unlock_irqrestore(&queue->lock, flags);

	cnt = cnt * sizeof(struct ptp_extts_event);

	mutex_unlock(&ptp->tsevq_mux);

	result = cnt;
	if (copy_to_user(buf, event, cnt))
		result = -EFAULT;

	kfree(event);
	return result;
}
Commit	Line	Data
74ba9207	1	// SPDX-License-Identifier: GPL-2.0-or-later
d94ba80e RC	2	/*
	3	* PTP 1588 clock support - character device implementation.
	4	*
	5	* Copyright (C) 2010 OMICRON electronics GmbH
d94ba80e RC	6	*/
	7	#include <linux/module.h>
	8	#include <linux/posix-clock.h>
	9	#include <linux/poll.h>
	10	#include <linux/sched.h>
c7ec0bad	11	#include <linux/slab.h>
719f1aa4	12	#include <linux/timekeeping.h>
d94ba80e	13
efa61c8c GS	14	#include <linux/nospec.h>
efa61c8c GS	15
d94ba80e RC	16	#include "ptp_private.h"
d94ba80e RC	17
6092315d RC	18	static int ptp_disable_pinfunc(struct ptp_clock_info *ops,
	19	enum ptp_pin_function func, unsigned int chan)
	20	{
	21	struct ptp_clock_request rq;
	22	int err = 0;
	23
	24	memset(&rq, 0, sizeof(rq));
	25
	26	switch (func) {
	27	case PTP_PF_NONE:
	28	break;
	29	case PTP_PF_EXTTS:
	30	rq.type = PTP_CLK_REQ_EXTTS;
	31	rq.extts.index = chan;
	32	err = ops->enable(ops, &rq, 0);
	33	break;
	34	case PTP_PF_PEROUT:
	35	rq.type = PTP_CLK_REQ_PEROUT;
	36	rq.perout.index = chan;
	37	err = ops->enable(ops, &rq, 0);
	38	break;
	39	case PTP_PF_PHYSYNC:
	40	break;
	41	default:
	42	return -EINVAL;
	43	}
	44
	45	return err;
	46	}
	47
	48	int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
	49	enum ptp_pin_function func, unsigned int chan)
	50	{
	51	struct ptp_clock_info *info = ptp->info;
	52	struct ptp_pin_desc pin1 = NULL, pin2 = &info->pin_config[pin];
	53	unsigned int i;
	54
	55	/* Check to see if any other pin previously had this function. */
	56	for (i = 0; i < info->n_pins; i++) {
	57	if (info->pin_config[i].func == func &&
	58	info->pin_config[i].chan == chan) {
	59	pin1 = &info->pin_config[i];
	60	break;
	61	}
	62	}
	63	if (pin1 && i == pin)
	64	return 0;
	65
	66	/* Check the desired function and channel. */
	67	switch (func) {
	68	case PTP_PF_NONE:
	69	break;
	70	case PTP_PF_EXTTS:
	71	if (chan >= info->n_ext_ts)
	72	return -EINVAL;
	73	break;
	74	case PTP_PF_PEROUT:
	75	if (chan >= info->n_per_out)
	76	return -EINVAL;
	77	break;
	78	case PTP_PF_PHYSYNC:
72df7a72 SS	79	if (chan != 0)
72df7a72 SS	80	return -EINVAL;
9ba8376c	81	break;
6092315d RC	82	default:
	83	return -EINVAL;
	84	}
	85
6092315d RC	86	if (info->verify(info, pin, func, chan)) {
	87	pr_err("driver cannot use function %u on pin %u\n", func, chan);
	88	return -EOPNOTSUPP;
	89	}
	90
	91	/* Disable whatever function was previously assigned. */
	92	if (pin1) {
	93	ptp_disable_pinfunc(info, func, chan);
	94	pin1->func = PTP_PF_NONE;
	95	pin1->chan = 0;
	96	}
	97	ptp_disable_pinfunc(info, pin2->func, pin2->chan);
	98	pin2->func = func;
	99	pin2->chan = chan;
	100
	101	return 0;
	102	}
	103
d94ba80e RC	104	int ptp_open(struct posix_clock *pc, fmode_t fmode)
	105	{
	106	return 0;
	107	}
	108
	109	long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
	110	{
d94ba80e	111	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
36180087	112	struct ptp_sys_offset_extended *extoff = NULL;
fbb960ac ML	113	struct ptp_sys_offset_precise precise_offset;
fbb960ac ML	114	struct system_device_crosststamp xtstamp;
d94ba80e	115	struct ptp_clock_info *ops = ptp->info;
fbb960ac	116	struct ptp_sys_offset *sysoff = NULL;
36180087	117	struct ptp_system_timestamp sts;
fbb960ac ML	118	struct ptp_clock_request req;
fbb960ac ML	119	struct ptp_clock_caps caps;
215b13dd	120	struct ptp_clock_time *pct;
fbb960ac ML	121	unsigned int i, pin_index;
fbb960ac ML	122	struct ptp_pin_desc pd;
e13cfcb0	123	struct timespec64 ts;
d94ba80e RC	124	int enable, err = 0;
	125
	126	switch (cmd) {
	127
	128	case PTP_CLOCK_GETCAPS:
41560658	129	case PTP_CLOCK_GETCAPS2:
d94ba80e	130	memset(&caps, 0, sizeof(caps));
41560658	131
d94ba80e RC	132	caps.max_adj = ptp->info->max_adj;
	133	caps.n_alarm = ptp->info->n_alarm;
	134	caps.n_ext_ts = ptp->info->n_ext_ts;
	135	caps.n_per_out = ptp->info->n_per_out;
	136	caps.pps = ptp->info->pps;
6092315d	137	caps.n_pins = ptp->info->n_pins;
719f1aa4	138	caps.cross_timestamping = ptp->info->getcrosststamp != NULL;
c3b60ab7 RR	139	caps.adjust_phase = ptp->info->adjphase != NULL &&
	140	ptp->info->getmaxphase != NULL;
	141	if (caps.adjust_phase)
	142	caps.max_phase_adj = ptp->info->getmaxphase(ptp->info);
e23ef227 DC	143	if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
e23ef227 DC	144	err = -EFAULT;
d94ba80e RC	145	break;
	146
	147	case PTP_EXTTS_REQUEST:
41560658 FB	148	case PTP_EXTTS_REQUEST2:
	149	memset(&req, 0, sizeof(req));
	150
d94ba80e RC	151	if (copy_from_user(&req.extts, (void __user *)arg,
	152	sizeof(req.extts))) {
	153	err = -EFAULT;
	154	break;
	155	}
cd734d54	156	if (cmd == PTP_EXTTS_REQUEST2) {
6138e687 RC	157	/* Tell the drivers to check the flags carefully. */
6138e687 RC	158	req.extts.flags \|= PTP_STRICT_FLAGS;
cd734d54 RC	159	/* Make sure no reserved bit is set. */
	160	if ((req.extts.flags & ~PTP_EXTTS_VALID_FLAGS) \|\|
	161	req.extts.rsv[0] \|\| req.extts.rsv[1]) {
	162	err = -EINVAL;
	163	break;
	164	}
	165	/* Ensure one of the rising/falling edge bits is set. */
	166	if ((req.extts.flags & PTP_ENABLE_FEATURE) &&
	167	(req.extts.flags & PTP_EXTTS_EDGES) == 0) {
	168	err = -EINVAL;
	169	break;
	170	}
41560658	171	} else if (cmd == PTP_EXTTS_REQUEST) {
2df4de16	172	req.extts.flags &= PTP_EXTTS_V1_VALID_FLAGS;
41560658 FB	173	req.extts.rsv[0] = 0;
	174	req.extts.rsv[1] = 0;
	175	}
d94ba80e RC	176	if (req.extts.index >= ops->n_ext_ts) {
	177	err = -EINVAL;
	178	break;
	179	}
	180	req.type = PTP_CLK_REQ_EXTTS;
	181	enable = req.extts.flags & PTP_ENABLE_FEATURE ? 1 : 0;
62582a7e RC	182	if (mutex_lock_interruptible(&ptp->pincfg_mux))
62582a7e RC	183	return -ERESTARTSYS;
d94ba80e	184	err = ops->enable(ops, &req, enable);
62582a7e	185	mutex_unlock(&ptp->pincfg_mux);
d94ba80e RC	186	break;
	187
	188	case PTP_PEROUT_REQUEST:
41560658 FB	189	case PTP_PEROUT_REQUEST2:
	190	memset(&req, 0, sizeof(req));
	191
d94ba80e RC	192	if (copy_from_user(&req.perout, (void __user *)arg,
	193	sizeof(req.perout))) {
	194	err = -EFAULT;
	195	break;
	196	}
f65b71aa VO	197	if (cmd == PTP_PEROUT_REQUEST2) {
	198	struct ptp_perout_request *perout = &req.perout;
	199
	200	if (perout->flags & ~PTP_PEROUT_VALID_FLAGS) {
	201	err = -EINVAL;
	202	break;
	203	}
	204	/*
	205	* The "on" field has undefined meaning if
	206	* PTP_PEROUT_DUTY_CYCLE isn't set, we must still treat
	207	* it as reserved, which must be set to zero.
	208	*/
	209	if (!(perout->flags & PTP_PEROUT_DUTY_CYCLE) &&
	210	(perout->rsv[0] \|\| perout->rsv[1] \|\|
	211	perout->rsv[2] \|\| perout->rsv[3])) {
	212	err = -EINVAL;
	213	break;
	214	}
	215	if (perout->flags & PTP_PEROUT_DUTY_CYCLE) {
	216	/* The duty cycle must be subunitary. */
	217	if (perout->on.sec > perout->period.sec \|\|
	218	(perout->on.sec == perout->period.sec &&
	219	perout->on.nsec > perout->period.nsec)) {
	220	err = -ERANGE;
	221	break;
	222	}
	223	}
c29f9aa3 VO	224	if (perout->flags & PTP_PEROUT_PHASE) {
	225	/*
	226	* The phase should be specified modulo the
	227	* period, therefore anything equal or larger
	228	* than 1 period is invalid.
	229	*/
	230	if (perout->phase.sec > perout->period.sec \|\|
	231	(perout->phase.sec == perout->period.sec &&
	232	perout->phase.nsec >= perout->period.nsec)) {
	233	err = -ERANGE;
	234	break;
	235	}
	236	}
41560658	237	} else if (cmd == PTP_PEROUT_REQUEST) {
2df4de16	238	req.perout.flags &= PTP_PEROUT_V1_VALID_FLAGS;
41560658 FB	239	req.perout.rsv[0] = 0;
	240	req.perout.rsv[1] = 0;
	241	req.perout.rsv[2] = 0;
	242	req.perout.rsv[3] = 0;
	243	}
d94ba80e RC	244	if (req.perout.index >= ops->n_per_out) {
	245	err = -EINVAL;
	246	break;
	247	}
	248	req.type = PTP_CLK_REQ_PEROUT;
	249	enable = req.perout.period.sec \|\| req.perout.period.nsec;
62582a7e RC	250	if (mutex_lock_interruptible(&ptp->pincfg_mux))
62582a7e RC	251	return -ERESTARTSYS;
d94ba80e	252	err = ops->enable(ops, &req, enable);
62582a7e	253	mutex_unlock(&ptp->pincfg_mux);
d94ba80e RC	254	break;
	255
	256	case PTP_ENABLE_PPS:
41560658 FB	257	case PTP_ENABLE_PPS2:
	258	memset(&req, 0, sizeof(req));
	259
d94ba80e RC	260	if (!capable(CAP_SYS_TIME))
	261	return -EPERM;
	262	req.type = PTP_CLK_REQ_PPS;
	263	enable = arg ? 1 : 0;
62582a7e RC	264	if (mutex_lock_interruptible(&ptp->pincfg_mux))
62582a7e RC	265	return -ERESTARTSYS;
d94ba80e	266	err = ops->enable(ops, &req, enable);
62582a7e	267	mutex_unlock(&ptp->pincfg_mux);
d94ba80e RC	268	break;
d94ba80e RC	269
719f1aa4	270	case PTP_SYS_OFFSET_PRECISE:
41560658	271	case PTP_SYS_OFFSET_PRECISE2:
719f1aa4 CH	272	if (!ptp->info->getcrosststamp) {
	273	err = -EOPNOTSUPP;
	274	break;
	275	}
	276	err = ptp->info->getcrosststamp(ptp->info, &xtstamp);
	277	if (err)
	278	break;
	279
02a9079c	280	memset(&precise_offset, 0, sizeof(precise_offset));
719f1aa4 CH	281	ts = ktime_to_timespec64(xtstamp.device);
	282	precise_offset.device.sec = ts.tv_sec;
	283	precise_offset.device.nsec = ts.tv_nsec;
	284	ts = ktime_to_timespec64(xtstamp.sys_realtime);
	285	precise_offset.sys_realtime.sec = ts.tv_sec;
	286	precise_offset.sys_realtime.nsec = ts.tv_nsec;
	287	ts = ktime_to_timespec64(xtstamp.sys_monoraw);
	288	precise_offset.sys_monoraw.sec = ts.tv_sec;
	289	precise_offset.sys_monoraw.nsec = ts.tv_nsec;
	290	if (copy_to_user((void __user *)arg, &precise_offset,
	291	sizeof(precise_offset)))
	292	err = -EFAULT;
	293	break;
	294
36180087	295	case PTP_SYS_OFFSET_EXTENDED:
41560658	296	case PTP_SYS_OFFSET_EXTENDED2:
36180087 ML	297	if (!ptp->info->gettimex64) {
	298	err = -EOPNOTSUPP;
	299	break;
	300	}
	301	extoff = memdup_user((void __user )arg, sizeof(extoff));
	302	if (IS_ERR(extoff)) {
	303	err = PTR_ERR(extoff);
	304	extoff = NULL;
	305	break;
	306	}
895ac137 ES	307	if (extoff->n_samples > PTP_MAX_SAMPLES
895ac137 ES	308	\|\| extoff->rsv[0] \|\| extoff->rsv[1] \|\| extoff->rsv[2]) {
36180087 ML	309	err = -EINVAL;
	310	break;
	311	}
	312	for (i = 0; i < extoff->n_samples; i++) {
	313	err = ptp->info->gettimex64(ptp->info, &ts, &sts);
	314	if (err)
	315	goto out;
	316	extoff->ts[i][0].sec = sts.pre_ts.tv_sec;
	317	extoff->ts[i][0].nsec = sts.pre_ts.tv_nsec;
	318	extoff->ts[i][1].sec = ts.tv_sec;
	319	extoff->ts[i][1].nsec = ts.tv_nsec;
	320	extoff->ts[i][2].sec = sts.post_ts.tv_sec;
	321	extoff->ts[i][2].nsec = sts.post_ts.tv_nsec;
	322	}
	323	if (copy_to_user((void __user )arg, extoff, sizeof(extoff)))
	324	err = -EFAULT;
	325	break;
	326
215b13dd	327	case PTP_SYS_OFFSET:
41560658	328	case PTP_SYS_OFFSET2:
2ece068e MFW	329	sysoff = memdup_user((void __user )arg, sizeof(sysoff));
	330	if (IS_ERR(sysoff)) {
	331	err = PTR_ERR(sysoff);
6756325a	332	sysoff = NULL;
215b13dd RC	333	break;
215b13dd RC	334	}
c3484c27	335	if (sysoff->n_samples > PTP_MAX_SAMPLES) {
215b13dd RC	336	err = -EINVAL;
	337	break;
	338	}
c3484c27 RC	339	pct = &sysoff->ts[0];
c3484c27 RC	340	for (i = 0; i < sysoff->n_samples; i++) {
f696a21c	341	ktime_get_real_ts64(&ts);
215b13dd RC	342	pct->sec = ts.tv_sec;
	343	pct->nsec = ts.tv_nsec;
	344	pct++;
916444df ML	345	if (ops->gettimex64)
	346	err = ops->gettimex64(ops, &ts, NULL);
	347	else
	348	err = ops->gettime64(ops, &ts);
83d0bdc7 ML	349	if (err)
83d0bdc7 ML	350	goto out;
215b13dd RC	351	pct->sec = ts.tv_sec;
	352	pct->nsec = ts.tv_nsec;
	353	pct++;
	354	}
f696a21c	355	ktime_get_real_ts64(&ts);
215b13dd RC	356	pct->sec = ts.tv_sec;
215b13dd RC	357	pct->nsec = ts.tv_nsec;
c3484c27	358	if (copy_to_user((void __user )arg, sysoff, sizeof(sysoff)))
215b13dd RC	359	err = -EFAULT;
	360	break;
	361
6092315d	362	case PTP_PIN_GETFUNC:
41560658	363	case PTP_PIN_GETFUNC2:
6092315d RC	364	if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
	365	err = -EFAULT;
	366	break;
	367	}
41560658 FB	368	if ((pd.rsv[0] \|\| pd.rsv[1] \|\| pd.rsv[2]
	369	\|\| pd.rsv[3] \|\| pd.rsv[4])
	370	&& cmd == PTP_PIN_GETFUNC2) {
	371	err = -EINVAL;
	372	break;
	373	} else if (cmd == PTP_PIN_GETFUNC) {
	374	pd.rsv[0] = 0;
	375	pd.rsv[1] = 0;
	376	pd.rsv[2] = 0;
	377	pd.rsv[3] = 0;
	378	pd.rsv[4] = 0;
	379	}
6092315d RC	380	pin_index = pd.index;
	381	if (pin_index >= ops->n_pins) {
	382	err = -EINVAL;
	383	break;
	384	}
efa61c8c	385	pin_index = array_index_nospec(pin_index, ops->n_pins);
6092315d RC	386	if (mutex_lock_interruptible(&ptp->pincfg_mux))
	387	return -ERESTARTSYS;
	388	pd = ops->pin_config[pin_index];
	389	mutex_unlock(&ptp->pincfg_mux);
	390	if (!err && copy_to_user((void __user *)arg, &pd, sizeof(pd)))
	391	err = -EFAULT;
	392	break;
	393
	394	case PTP_PIN_SETFUNC:
41560658	395	case PTP_PIN_SETFUNC2:
6092315d RC	396	if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
	397	err = -EFAULT;
	398	break;
	399	}
41560658 FB	400	if ((pd.rsv[0] \|\| pd.rsv[1] \|\| pd.rsv[2]
	401	\|\| pd.rsv[3] \|\| pd.rsv[4])
	402	&& cmd == PTP_PIN_SETFUNC2) {
	403	err = -EINVAL;
	404	break;
	405	} else if (cmd == PTP_PIN_SETFUNC) {
	406	pd.rsv[0] = 0;
	407	pd.rsv[1] = 0;
	408	pd.rsv[2] = 0;
	409	pd.rsv[3] = 0;
	410	pd.rsv[4] = 0;
	411	}
6092315d RC	412	pin_index = pd.index;
	413	if (pin_index >= ops->n_pins) {
	414	err = -EINVAL;
	415	break;
	416	}
efa61c8c	417	pin_index = array_index_nospec(pin_index, ops->n_pins);
6092315d RC	418	if (mutex_lock_interruptible(&ptp->pincfg_mux))
	419	return -ERESTARTSYS;
	420	err = ptp_set_pinfunc(ptp, pin_index, pd.func, pd.chan);
	421	mutex_unlock(&ptp->pincfg_mux);
	422	break;
	423
d94ba80e RC	424	default:
	425	err = -ENOTTY;
	426	break;
	427	}
c3484c27	428
83d0bdc7	429	out:
36180087	430	kfree(extoff);
c3484c27	431	kfree(sysoff);
d94ba80e RC	432	return err;
	433	}
	434
afc9a42b	435	__poll_t ptp_poll(struct posix_clock pc, struct file fp, poll_table *wait)
d94ba80e RC	436	{
	437	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
	438
	439	poll_wait(fp, &ptp->tsev_wq, wait);
	440
a9a08845	441	return queue_cnt(&ptp->tsevq) ? EPOLLIN : 0;
d94ba80e RC	442	}
d94ba80e RC	443
c7ec0bad RC	444	#define EXTTS_BUFSIZE (PTP_BUF_TIMESTAMPS * sizeof(struct ptp_extts_event))
c7ec0bad RC	445
d94ba80e RC	446	ssize_t ptp_read(struct posix_clock *pc,
	447	uint rdflags, char __user *buf, size_t cnt)
	448	{
	449	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
	450	struct timestamp_event_queue *queue = &ptp->tsevq;
c7ec0bad	451	struct ptp_extts_event *event;
d94ba80e RC	452	unsigned long flags;
d94ba80e RC	453	size_t qcnt, i;
c7ec0bad	454	int result;
d94ba80e RC	455
	456	if (cnt % sizeof(struct ptp_extts_event) != 0)
	457	return -EINVAL;
	458
c7ec0bad RC	459	if (cnt > EXTTS_BUFSIZE)
c7ec0bad RC	460	cnt = EXTTS_BUFSIZE;
d94ba80e RC	461
	462	cnt = cnt / sizeof(struct ptp_extts_event);
	463
	464	if (mutex_lock_interruptible(&ptp->tsevq_mux))
	465	return -ERESTARTSYS;
	466
	467	if (wait_event_interruptible(ptp->tsev_wq,
	468	ptp->defunct \|\| queue_cnt(queue))) {
	469	mutex_unlock(&ptp->tsevq_mux);
	470	return -ERESTARTSYS;
	471	}
	472
fb5a18cf DC	473	if (ptp->defunct) {
fb5a18cf DC	474	mutex_unlock(&ptp->tsevq_mux);
d94ba80e	475	return -ENODEV;
fb5a18cf	476	}
d94ba80e	477
c7ec0bad RC	478	event = kmalloc(EXTTS_BUFSIZE, GFP_KERNEL);
	479	if (!event) {
	480	mutex_unlock(&ptp->tsevq_mux);
	481	return -ENOMEM;
	482	}
	483
d94ba80e RC	484	spin_lock_irqsave(&queue->lock, flags);
	485
	486	qcnt = queue_cnt(queue);
	487
	488	if (cnt > qcnt)
	489	cnt = qcnt;
	490
	491	for (i = 0; i < cnt; i++) {
	492	event[i] = queue->buf[queue->head];
	493	queue->head = (queue->head + 1) % PTP_MAX_TIMESTAMPS;
	494	}
	495
	496	spin_unlock_irqrestore(&queue->lock, flags);
	497
	498	cnt = cnt * sizeof(struct ptp_extts_event);
	499
	500	mutex_unlock(&ptp->tsevq_mux);
	501
c7ec0bad	502	result = cnt;
fb5a18cf	503	if (copy_to_user(buf, event, cnt))
c7ec0bad	504	result = -EFAULT;
d94ba80e	505
c7ec0bad RC	506	kfree(event);
c7ec0bad RC	507	return result;
d94ba80e	508	}